Headset



FIG. 1 is a front perpsective view of my design;

FIG. 2 is an rear perspective view;

FIG. 3 is a front view;

FIG. 4 is a rear view;

FIG. 5 is a first side view;

FIG. 6 is a second side view; and,

FIG. 7 is a top view.

The broken line in the Figures depict portions of the headset that form no part of the claimed design. 

CLAIM The ornamental design for a headset, as shown and described. 